Rotary pump.



N3. 331,933. PATENTED SEPT. 25, 1903. H. R. OOMLY.

ROTARY PUMP.

APPLICATION FILED MAR. 8,1905.

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WITNESSES.

ATTORNEYS PATENTED SEPT. 25, 1906 H. R. GOMLY.

ROTARY PUMP.

APPLICATION FILED MAR. 22, 1905.

INVENTOR- HARRY R. 00M LY ATTORNEYS UNITED STATES PATENT OFFICE.

HARRY RETZER eoMLY, OF sAN DIEGO, CALIFORNIA.

ROTARY PUMP.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed March 8, 1905. Serial No. 249.118.

To all 7071 0771 it may concern:

Be it known that I, HARRYRETZER CoMLY,

a citizen of the United States, and a resident of San Diego, in the county of San Diego and State of California, have invented an Improvement in Rotary Pumps, of which the following is a specification.

My invention is an improvement in that class of rotary pumps which comprise a cylinder, a cylindrical piston arranged eccentrieally therein, and a slidable abutment or cut-off which reciproeates corresponding to the rotation of the piston, whereby fluid is Fig. 4 is a vertical section on line 4 4 of Fig.

2. Fig. 5 is a perspective View of a reciprocating frame to which the sliding abutment or cut-off is attached. Fig. 6 is a section on the line 6 6 of Fig. 1.

A hollow cylinder A-is arranged horizontally and supported upon a suitable pedestal a. (See Figs. 1, 4, and 6.) A cylindrical piston B is arranged within the cylinder A and mounted eeeentrically upon a shaft C, which has its hearings in the ends of the cylinder and is concentric therewith. Upon the said shaft C, exteriorly to the heads of the cylinder A, are keyed cams D, the same being practically disks arranged eceentrically upon the shaft. A frame E, (see Fig. 5,) forming three sides of a rectangle, is arranged in connection with the cylinder A, so that its side portions are parallel and contiguous to the ends-of the cylinder, as will be understood by reference to Figs. 1 and 2. The side portions or arms of this frame E areprovided with loops 6, which are practically oblong rectangles. The shaft passes through the openings in these loops, which thus allow the frame E to be reciprocated without contact with the shaft, as will be readily understood. Each side member or arm of the frame E is provided with two stub axles or journals e (2, (see Fig. 2,) upon which are journaled disks or wheels 1 The distance between the peripheries of each pair of wheels F is the same as the diameter of thccams l), and, as shown in Figs. 1 and 2, the cams thus work in contact with the wheels F. It is apparent that if the shaft 0 be rotated the cams D will reciprocate the frame E horizontally. The frame is guided in its movement by the flanges or ribs a, which are attached to and preferably east integrally with the ends of the cylinder A. The cylinder A is provided on one side with an induction-port G and an eduetion-port G, as shown plainly in Figs. 1 and 4. The ports proper extend about two thirds of the length of the cylinder and are provided with flaring tubular mouths that project in opposite directions vertically. A sliding abutment or cut-off H is-arranged between these portsthat is to say, the inner sides of the tubular passages constituting the ports G G are formed parallel and separated by a space equaling or slightly exceeding the thickness of the sliding abutment H. Thus a rectilinear guide is provided for the abutment by this construction, and the abutment is arranged between the ports so as to entirely separate them from each other. The inner end of the abutment His provided with a pivoted device H, which in practical 0 eration forms a part thereof. As shown in ig. 3, this device is composed of a metal part it and a packing or wear portion h. The part it is preferably formed of thick sheet metal which practically forms a tube that is open at one side, the edges of the metal sheet diverging at that point at a slight angle. The interior of the part it is filled with leather, which is inserted and secured in the tubular portion around rod 71. passing through the center thereof and extending the entire length of the tube. The outer edge of the packing h, which lies between'the flaring wings or flanges of the tubular body, is slightly curved, corresponding to the radius of the piston, so that it will fit the periphery of the same, as shown in Fig. 4. The device H is pivotally connected with the sliding abutment or cut-off H, it being held in a recess formed in the inner end of the abutment, the same being slightly more than a semicircle, so as to hold the device with 'due security while permitting it to oscillate freely. The cylindrical or tubular portion h of the oscillating device H is adapted to slide endwise in the groove or socket formed in the end of the abutment, and when duly inserted it is held in place by the removable ends of the cylinder. It is apparent that as the piston B rotates it changes position in the cylin- IIO der, so that the device H cants or shifts gradually from one angle to another and always remains in perfect contact with the piston, so that the passage of Water from one side to the other of the abutment is effectually prevented at that point. When leather is not used, the whole of the device may be constructed of solid metal. Leather strips are also provided in the longer limb of the piston and also in the sides of the sliding abutment H to serve as packing in a well-known way.

The sliding abutment or cut-off H is connected with the frame E in the following manner: The abutment is provided with a screw-shank 7?, (see Figs. 2 and-4,) which asses through the center of the bar E, orming an attachment of the frame proper, E. The ends of the side members or arms of the frame Eare provided with screw-threaded extensions a, (see Fig. 5,) which pass through the openin s in the ends of the bar E, nuts 6 being app ied to hold the bar in the required position. A nut it (see Figs. 1, 2, 4) is app ied to the outer end of the screw shank or stem k of the abutment H and is in practice so adjusted as to allow the device H to work in easy contact with the piston B. Spiral springs I (see Fig. 2) are arranged in opposite cavities in the abutment H and the bar E and serve to exert pressure upon the abutment in the direction of the piston. The tension and pressure of these springs I are regulated by screws J, which work in threaded openings in the bar E, their inner ends bearing upon the disks, which in turn rest upon the springs. It is apparent that by adjustment ofthe screws J any required degree of tension may be produced. The nut 72/, before described as applied to the screw-shank of the abutment, prevents undue friction between the contact-piece H and the piston, which mi ht otherwise be caused by the springs I. n the inner side of the bar E, opposite the nut 7L4, is arranged a nut 71, (see Fig. 2,) the same being located in a cavity in the bar, and in ractice it is so adjusted that a space is left etween it and the bar, as shown, so that the abutment has due play or freedom of movement outward. Itwill be seen that the frame E, with the bar E, is practically in the form of a parallelogram or oblong rectan le and surrounds the cylinder and is guide in its reciprocations, the abutment and the piston contactiece H moving with it, as before described. otation may be imparted to the pum shaft C by any preferred means, and as t e piston rotates water enters at G, a crescentshaped space on one side of the piston, and as the longer limb or most eccentric portion of the piston moves away from the induction-port the water follows and fills the chamber and finds escape at G when the piston has rotated past the same, the crescent chamber being thus filled and discharged at each rotation of the piston, so that a practically constant stream of water flows through the pump. The pump is ada ted to receive and discharge at each rotation of the piston a quantity of water equal to forty per cent. of the cubical capacity of the cylinder.-

What I claim is In a rotary pump of the class indicated, the combination, with the cylinder having induction and eduction ports, a rotary piston mounted eccentrically therein, a sliding abutment arranged between the ports and .reci rocating in suitable guides, and a device wor ing in contact with the piston and pivotally attached to the abutment, the same comprising a sheet-metal tube having a longitudinal slot and flanges or win s extending outwardly from the edges of t e slot, and

packing) arranged in the tube and fillin the spaces etween the flanges, substantial y as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HARRY RETZER COMLY.

Witnesses:

FRANK S. Jarvnmes, HANS MURGUARDS. 

